<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style type="text/css">
        * {margin: 0;padding: 0;}
        ul {width: 240px;list-style-type: none;}
        ul li {
            height: 32px;background: #999999;
            margin-bottom: 1px;border-left: 12px solid #333333;
        }
        ul li:hover{background: #333333;}
        ul li a{
            display: block;height: 100%;color: white;
            text-decoration: none;line-height: 32px;padding-left: 8px;
        }
    </style>
</head>
<body>
<ul>
    <li><a href="#">首页</a> </li>
    <li><a href="#">关于</a> </li>
    <li><a href="#">工程</a> </li>
    <li><a href="#">会员</a> </li>
    <li><a href="#">联系</a> </li>
</ul>
</body>
</html>